In this fashion, with dual hot-swappable power supplies, there is no single point of failure in the power system. For example, you can remove any power supply, including a PDU, and everything continues to work.
This is applicable to either North American or European installation sites Ñ(with a 230 VAC Inverter).
The secondary rack supports four servers and follows a similar scheme.
Each server receives a feed from each PDU and a different branch circuit.
ÑEach PDU receives four branch circuits.
The customer must be able to shut off any branch, and every unit at the Ñsite will continue to function properly.
Ñ
Minimum installation is one Power Distribution Unit (PDU) with four 48VDC branch circuits fused at 20 amperes.
May 2003 | Power supply installation |
-48VDC power distribution rationale
Part 2: 1001rp Server Hardware Installation | 47 |